/*
Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
Copyright (C) ITsysCOM GmbH

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>
*/

package engine

import (
	"time"

	"github.com/cgrates/birpc/context"
	"github.com/cgrates/cgrates/utils"
	"github.com/ericlagergren/decimal"
)

// GetFloat64Opts checks the specified option names in order among the keys in APIOpts returning the first value it finds as float64, otherwise it
// returns the config option if at least one filter passes or NOT_FOUND if none of them do
func GetFloat64Opts(ctx *context.Context, tnt string, ev *utils.CGREvent, fS *FilterS, dynOpts []*utils.DynamicFloat64Opt,
	optNames ...string) (cfgOpt float64, err error) {
	for _, optName := range optNames {
		if opt, has := ev.APIOpts[optName]; has {
			return utils.IfaceAsFloat64(opt)
		}
	}
	evDP := ev.AsDataProvider()
	var hasDefault bool
	for _, opt := range dynOpts { // iterate through the options
		if len(opt.FilterIDs) == 1 && opt.FilterIDs[0] == utils.MetaDefault {
			hasDefault = true
			cfgOpt = opt.Value
			continue
		}
		if pass, err := fS.Pass(ctx, tnt, opt.FilterIDs, evDP); err != nil { // check if the filter is passing for the DataProvider and return the option if it does
			return 0, err
		} else if pass {
			return opt.Value, nil
		}
	}
	if !hasDefault {
		err = utils.ErrNotFound
	}
	return // return the option or NOT_FOUND if there are no options or none of the filters pass
}

// GetDurationOpts checks the specified option names in order among the keys in APIOpts returning the first value it finds as time.Duration, otherwise it
// returns the config option if at least one filter passes or NOT_FOUND if none of them do
func GetDurationOpts(ctx *context.Context, tnt string, ev *utils.CGREvent, fS *FilterS, dynOpts []*utils.DynamicDurationOpt,
	optNames ...string) (cfgOpt time.Duration, err error) {
	for _, optName := range optNames {
		if opt, has := ev.APIOpts[optName]; has {
			return utils.IfaceAsDuration(opt)
		}
	}
	evDP := ev.AsDataProvider()
	var hasDefault bool
	for _, opt := range dynOpts { // iterate through the options
		if len(opt.FilterIDs) == 1 && opt.FilterIDs[0] == utils.MetaDefault {
			hasDefault = true
			cfgOpt = opt.Value
			continue
		}
		if pass, err := fS.Pass(ctx, tnt, opt.FilterIDs, evDP); err != nil { // check if the filter is passing for the DataProvider and return the option if it does
			return 0, err
		} else if pass {
			return opt.Value, nil
		}
	}
	if !hasDefault {
		err = utils.ErrNotFound
	}
	return // return the option or NOT_FOUND if there are no options or none of the filters pass
}

// GetStringOpts checks the specified option names in order among the keys in APIOpts returning the first value it finds as string, otherwise it
// returns the config option if at least one filter passes or NOT_FOUND if none of them do
func GetStringOpts(ctx *context.Context, tnt string, ev *utils.CGREvent, fS *FilterS, dynOpts []*utils.DynamicStringOpt,
	optNames ...string) (cfgOpt string, err error) {
	for _, optName := range optNames {
		if opt, has := ev.APIOpts[optName]; has {
			return utils.IfaceAsString(opt), nil
		}
	}
	evDP := ev.AsDataProvider()
	var hasDefault bool
	for _, opt := range dynOpts { // iterate through the options
		if len(opt.FilterIDs) == 1 && opt.FilterIDs[0] == utils.MetaDefault {
			hasDefault = true
			cfgOpt = opt.Value
			continue
		}
		if pass, err := fS.Pass(ctx, tnt, opt.FilterIDs, evDP); err != nil { // check if the filter is passing for the DataProvider and return the option if it does
			return utils.EmptyString, err
		} else if pass {
			return opt.Value, nil
		}
	}
	if !hasDefault {
		err = utils.ErrNotFound
	}
	return // return the option or NOT_FOUND if there are no options or none of the filters pass
}

// GetTimeOpts checks the specified option names in order among the keys in APIOpts returning the first value it finds as time.Time, otherwise it
// returns the config option if at least one filter passes or NOT_FOUND if none of them do
func GetTimeOpts(ctx *context.Context, tnt string, ev *utils.CGREvent, fS *FilterS, dynOpts []*utils.DynamicStringOpt,
	tmz string, optNames ...string) (_ time.Time, err error) {
	for _, optName := range optNames {
		if opt, has := ev.APIOpts[optName]; has {
			return utils.IfaceAsTime(opt, tmz)
		}
	}
	evDP := ev.AsDataProvider()
	var cfgOptStr string
	var hasDefault bool
	for _, opt := range dynOpts { // iterate through the options
		if len(opt.FilterIDs) == 1 && opt.FilterIDs[0] == utils.MetaDefault {
			hasDefault = true
			cfgOptStr = opt.Value
			continue
		}
		var pass bool
		if pass, err = fS.Pass(ctx, tnt, opt.FilterIDs, evDP); err != nil { // check if the filter is passing for the DataProvider and return the option if it does
			return
		} else if pass {
			return utils.ParseTimeDetectLayout(opt.Value, tmz)
		}
	}
	if !hasDefault {
		err = utils.ErrNotFound
		return
	}
	return utils.ParseTimeDetectLayout(cfgOptStr, tmz) // return the option or NOT_FOUND if there are no options or none of the filters pass
}

// GetStringSliceOpts checks the specified option names in order among the keys in APIOpts returning the first value it finds as []string, otherwise it
// returns the config option if at least one filter passes or NOT_FOUND if none of them do
func GetStringSliceOpts(ctx *context.Context, tnt string, ev *utils.CGREvent, fS *FilterS, dynOpts []*utils.DynamicStringSliceOpt,
	optNames ...string) (cfgOpt []string, err error) {
	for _, optName := range optNames {
		if opt, has := ev.APIOpts[optName]; has {
			return utils.IfaceAsStringSlice(opt)
		}
	}
	evDP := ev.AsDataProvider()
	var hasDefault bool
	for _, opt := range dynOpts { // iterate through the options
		if len(opt.FilterIDs) == 1 && opt.FilterIDs[0] == utils.MetaDefault {
			hasDefault = true
			cfgOpt = opt.Value
			continue
		}
		if pass, err := fS.Pass(ctx, tnt, opt.FilterIDs, evDP); err != nil { // check if the filter is passing for the DataProvider and return the option if it does
			return nil, err
		} else if pass {
			return opt.Value, nil
		}
	}
	if !hasDefault {
		err = utils.ErrNotFound
	}
	return // return the option or NOT_FOUND if there are no options or none of the filters pass
}

// GetIntOpts checks the specified option names in order among the keys in APIOpts returning the first value it finds as int, otherwise it
// returns the config option if at least one filter passes or NOT_FOUND if none of them do
func GetIntOpts(ctx *context.Context, tnt string, ev *utils.CGREvent, fS *FilterS, dynOpts []*utils.DynamicIntOpt,
	optNames ...string) (cfgOpt int, err error) {
	for _, optName := range optNames {
		if opt, has := ev.APIOpts[optName]; has {
			var value int64
			if value, err = utils.IfaceAsTInt64(opt); err != nil {
				return 0, err
			}
			return int(value), nil
		}
	}
	evDP := ev.AsDataProvider()
	var hasDefault bool
	for _, opt := range dynOpts { // iterate through the options
		if len(opt.FilterIDs) == 1 && opt.FilterIDs[0] == utils.MetaDefault {
			hasDefault = true
			cfgOpt = opt.Value
			continue
		}
		if pass, err := fS.Pass(ctx, tnt, opt.FilterIDs, evDP); err != nil { // check if the filter is passing for the DataProvider and return the option if it does
			return 0, err
		} else if pass {
			return opt.Value, nil
		}
	}
	if !hasDefault {
		err = utils.ErrNotFound
	}
	return // return the option or NOT_FOUND if there are no options or none of the filters pass
}

// GetBoolOpts checks the specified option names in order among the keys in APIOpts returning the first value it finds as bool, otherwise it
// returns the config option if at least one filter passes or NOT_FOUND if none of them do
func GetBoolOpts(ctx *context.Context, tnt string, ev *utils.CGREvent, fS *FilterS, dynOpts []*utils.DynamicBoolOpt,
	optNames ...string) (cfgOpt bool, err error) {
	for _, optName := range optNames {
		if opt, has := ev.APIOpts[optName]; has {
			return utils.IfaceAsBool(opt)
		}
	}
	evDP := ev.AsDataProvider()
	var hasDefault bool
	for _, opt := range dynOpts { // iterate through the options
		if len(opt.FilterIDs) == 1 && opt.FilterIDs[0] == utils.MetaDefault {
			hasDefault = true
			cfgOpt = opt.Value
			continue
		}
		if pass, err := fS.Pass(ctx, tnt, opt.FilterIDs, evDP); err != nil { // check if the filter is passing for the DataProvider and return the option if it does
			return false, err
		} else if pass {
			return opt.Value, nil
		}
	}
	if !hasDefault {
		err = utils.ErrNotFound
	}
	return // return the option or NOT_FOUND if there are no options or none of the filters pass
}

// GetDecimalBigOpts checks the specified option names in order among the keys in APIOpts returning the first value it finds as *decimal.Big, otherwise it
// returns the config option if at least one filter passes or NOT_FOUND if none of them do
func GetDecimalBigOpts(ctx *context.Context, tnt string, ev *utils.CGREvent, fS *FilterS, dynOpts []*utils.DynamicDecimalBigOpt,
	optNames ...string) (cfgOpt *decimal.Big, err error) {
	for _, optName := range optNames {
		if opt, has := ev.APIOpts[optName]; has {
			return utils.IfaceAsBig(opt)
		}
	}
	evDP := ev.AsDataProvider()
	var hasDefault bool
	for _, opt := range dynOpts { // iterate through the options
		if len(opt.FilterIDs) == 1 && opt.FilterIDs[0] == utils.MetaDefault {
			hasDefault = true
			cfgOpt = opt.Value
			continue
		}
		if pass, err := fS.Pass(ctx, tnt, opt.FilterIDs, evDP); err != nil { // check if the filter is passing for the DataProvider and return the option if it does
			return nil, err
		} else if pass {
			return opt.Value, nil
		}
	}
	if !hasDefault {
		err = utils.ErrNotFound
	}
	return // return the option or NOT_FOUND if there are no options or none of the filters pass
}

// GetInterfaceOpts checks the specified option names in order among the keys in APIOpts returning the first value it finds as interface{}, otherwise it
// returns the config option if at least one filter passes or NOT_FOUND if none of them do
func GetInterfaceOpts(ctx *context.Context, tnt string, ev *utils.CGREvent, fS *FilterS, dynOpts []*utils.DynamicInterfaceOpt,
	optNames ...string) (cfgOpt interface{}, err error) {
	for _, optName := range optNames {
		if opt, has := ev.APIOpts[optName]; has {
			return opt, nil
		}
	}
	evDP := ev.AsDataProvider()
	var hasDefault bool
	for _, opt := range dynOpts { // iterate through the options
		if len(opt.FilterIDs) == 1 && opt.FilterIDs[0] == utils.MetaDefault {
			hasDefault = true
			cfgOpt = opt.Value
			continue
		}
		if pass, err := fS.Pass(ctx, tnt, opt.FilterIDs, evDP); err != nil { // check if the filter is passing for the DataProvider and return the option if it does
			return false, err
		} else if pass {
			return opt.Value, nil
		}
	}
	if !hasDefault {
		err = utils.ErrNotFound
	}
	return // return the option or NOT_FOUND if there are no options or none of the filters pass
}